comScore Releases Rankings For Top Japanese Web Properties

54 Million People Online in Japan in June

London, UK, August 3, 2007 – comScore (NASDAQ: SCOR), a leader in measuring the digital world, today released its first report on Japan’s top Internet properties and top gaining properties for June. The study was based on data collected through the comScore World Metrix audience ratings service and took into account all unique visitors age 15 and over, who accessed the Internet from a home or work computer.

There were a total of 53.7 million unique visitors online in Japan in June, or 49 percent of the country’s population, age 15 or older

Yahoo! was the most popular property, with 41.5 million unique visitors. Yahoo! now reaches 77 percent of the total Japanese online population, and averaged 33 visits per visitor in June

The average Japanese Internet user spends 15 days per month online

Maru Sato, Managing Director of comScore Japan, said: “Yahoo! is the most popular property in Japan by some margin. Behind them, Google and Microsoft Sites are locked in a battle for second place, with 31.3 million unique visitors and 31.0 million unique visitors respectively.”

Top 10 Properties by Japanese Unique Visitors, Age 15+*June 2007Total Japanese – Home and Work Locations**Source: comScore World Metrix

Property

Total Unique Visitors (000)

June 2007

% Reach

Average Usage

Days per Visitor

Total Japanese Internet Audience, age 15+

53,716

100%

15

Yahoo! Sites

41,515

77%

13

Google Sites

31,294

58%

9

Microsoft Sites

31,033

58%

7

Rakuten Inc

28,685

53%

6

FC2.COM

25,477

47%

7

NTT Group

25,221

47%

5

Nifty Corporation

21,993

41%

4

Wikipedia Sites

19,417

36%

4

LIVEDOOR.COM

19,145

36%

4

Amazon Sites

18,342

34%

*Ranking based on the top 100 Japanese properties in June 2007.** Excludes traffic from public computers such as Internet cafes or access from mobile phones or PDAs.

IZA.NE.JP, a user participation news site set up by the Sankei Newspaper Group in June 2006, was the fastest growing site, increasing traffic by 52 percent from 2.3 million unique visitors to 3.5 million unique visitors.

Commented Mr. Sato, “Despite being only a year old, the IZA.NE.JP property has undergone significant growth, particularly over the last few months. This can be attributed in large part to a number of scandals being associated with the recent Japanese Government, as well as the impending Upper House Election at the end of July.”

Thanks to a new software download and the continued uptake of its Firefox Internet browser, the Mozilla Organisation enjoyed a 26 percent increase in unique visitors in June. Another software provider, Adobe Sites, enjoyed the same 26 percent traffic uplift as a result of the release of an Acrobat Reader update.

The second fastest growing property was Mizuho Financial Group, which increased traffic by 34 percent, closely followed by entertainment group NAMCO BANDAI Holdings Inc. which increased traffic by 31 percent.

Top 10 Gaining Properties by Japanese Unique Visitors, Age 15+*June 2007 vs. May 2007Total Japanese – Home and Work Locations**Source: comScore World Metrix

Property

Total Unique Visitors (000) May 2007

Total Unique Visitors (000) June 2007

% Change

Total Japanese Internet Audience, age 15+

53,682

53,716

0%

IZA.NE.JP

2,275

3,464

52%

Mizuho Financial Group

1,841

2,459

34%

NAMCO BANDAI Holdings Inc.

1,763

2,318

31%

DIVX.COM

1,965

2,554

30%

The Mozilla Organization

2,068

2,609

26%

Adobe Sites

5,322

6,684

26%

TV-ASAHI.CO.JP

2,658

3,202

20%

JTB.CO.JP

1,960

2,346

20%

ZAKZAK.CO.JP

1,986

2,372

19%

Toshiba Corp

2,105

2,306

10%

*Ranking based on the top 100 Japanese properties in June 2007.** Excludes traffic from public computers such as Internet cafes or access from mobile phones or PDAs.

About comScore

comScore, Inc. (NASDAQ: SCOR) is a global leader in measuring the digital world. This capability is based on a massive, global cross-section of more than 2 million consumers who have given comScore permission to confidentially capture their browsing and transaction behavior, including online and offline purchasing. comScore panelists also participate in survey research that captures and integrates their attitudes and intentions. Through its proprietary technology, comScore measures what matters across a broad spectrum of behavior and attitudes. comScore analysts apply this deep knowledge of customers and competitors to help clients design powerful marketing strategies and tactics that deliver superior ROI. comScore services are used by more than 700 clients, including global leaders such as AOL, Microsoft, Yahoo!, BBC, Carat, Cyworld, Deutsche Bank, France Telecom, Best Buy, The Newspaper Association of America, Financial Times, ESPN, Fox Sports, Nestlé, Starcom, Universal McCann, the United States Postal Service, Verizon, ViaMichelin, Merck and Expedia. For more information, please visit www.comscore.com.